//文件上传服务层
app.service("uploadService",function($http){
this.uploadFile=function(){
var formData=new FormData();
 formData.append("file",file.files[0]);
return $http({
 method:'POST',
 url:"../upload.do",
 data: formData,
 headers: {'Content-Type':undefined},
 transformRequest: angular.identity
 });
}
});
